/*
 * @Description: 编码转换
 * @Autor: CDKEY
 * @Date: 2021-07-31 05:06:25
 */

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>

// UTF-8到GB2312的转换
char* U2G(const char* utf8) {
    int len = MultiByteToWideChar(CP_UTF8, 0, utf8, -1, NULL, 0);
    wchar_t* wstr = new wchar_t[len + 1];
    memset(wstr, 0, len + 1);
    MultiByteToWideChar(CP_UTF8, 0, utf8, -1, wstr, len);
    len = WideCharToMultiByte(CP_ACP, 0, wstr, -1, NULL, 0, NULL, NULL);
    char* str = new char[len + 1];
    memset(str, 0, len + 1);
    WideCharToMultiByte(CP_ACP, 0, wstr, -1, str, len, NULL, NULL);
    if (wstr)
        delete[] wstr;
    return str;
}

// GB2312到UTF-8的转换
char* G2U(const char* gb2312) {
    int len = MultiByteToWideChar(CP_ACP, 0, gb2312, -1, NULL, 0);
    wchar_t* wstr = new wchar_t[len + 1];
    memset(wstr, 0, len + 1);
    MultiByteToWideChar(CP_ACP, 0, gb2312, -1, wstr, len);
    len = WideCharToMultiByte(CP_UTF8, 0, wstr, -1, NULL, 0, NULL, NULL);
    char* str = new char[len + 1];
    memset(str, 0, len + 1);
    WideCharToMultiByte(CP_UTF8, 0, wstr, -1, str, len, NULL, NULL);
    if (wstr)
        delete[] wstr;
    return str;
}

int main() {
    const char* str = U2G("你好啊");
    printf("%s", str);

    system("pause");
    return 0;
}